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WO2010061684A1 - Dispositif d’illumination et dispositif d’affichage d’image par projection - Google Patents

Dispositif d’illumination et dispositif d’affichage d’image par projection Download PDF

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Publication number
WO2010061684A1
WO2010061684A1 PCT/JP2009/067019 JP2009067019W WO2010061684A1 WO 2010061684 A1 WO2010061684 A1 WO 2010061684A1 JP 2009067019 W JP2009067019 W JP 2009067019W WO 2010061684 A1 WO2010061684 A1 WO 2010061684A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
projection display
display apparatus
lighting device
face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2009/067019
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English (en)
Japanese (ja)
Inventor
松本　慎也
安東　孝久
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to EP09828933A priority Critical patent/EP2369410A4/fr
Priority to CN2009801467456A priority patent/CN102224456A/zh
Publication of WO2010061684A1 publication Critical patent/WO2010061684A1/fr
Priority to US13/111,210 priority patent/US20110216286A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/0008—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted at the end of the fibre
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/3144—Cooling systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3161—Modulator illumination systems using laser light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4249—Packages, e.g. shape, construction, internal or external details comprising arrays of active devices and fibres

Definitions

  • the present invention relates to an illuminating device that combines light from a plurality of light sources with optical fibers, and a projection display device including the illuminating device.
  • projector a projection display apparatus that modulates light from a light source based on an image signal and projects image light generated thereby on a projection surface.
  • This type of projector is required to increase the brightness of the image light as the screen becomes larger in recent years. For this reason, it is necessary to increase the brightness of the illumination light in the illumination device mounted on the projector. Yes.
  • Patent Document 1 describes an illumination device using a plurality of laser light sources.
  • a plurality of laser light sources for emitting red, blue, and green laser beams are provided.
  • Laser light emitted from each laser light source is incident on the rod integrator for each color via an optical fiber.
  • Each color laser beam emitted from the rod integrator is incident on a spatial modulation element such as a transmissive LCD (Liquid Crystal Display) via a light guide optical system, and is modulated in accordance with a video signal.
  • a spatial modulation element such as a transmissive LCD (Liquid Crystal Display)
  • the present invention has been made to solve such a problem, and is equipped with an illuminating device capable of suppressing deterioration of a bundled portion of an optical fiber due to heat generated by light emission, and the illuminating device.
  • An object of the present invention is to provide a projection-type image display apparatus.
  • the illumination device includes a plurality of light sources that emit light, a plurality of optical fibers that receive light emitted from each of the light sources, and a binding unit that binds emission end portions of the plurality of optical fibers. And a cooling system that cools at least the light emitting end face of the bundling portion.
  • the light emission end face of the bundling portion is cooled by the cooling system, so that it is possible to suppress the temperature rise of the light emission end face of the bundling portion excessively. Therefore, it is possible to suppress the deterioration of the binding portion due to the heat generated by the light emission.
  • the cooling system may include a configuration in which cooling air is circulated to the light emitting end surface of the bundling portion. If it carries out like this, the light-projection end surface of the binding part which is most likely to be heated up can be efficiently cooled. Moreover, it can suppress that dust etc. adhere to the light-projection surface of a bundling part by distribute
  • the cooling system may be configured to distribute the cooling air together with ions having an antistatic effect. In this way, it is possible to further suppress the adhesion of dust and the like on the light exit surface of the bundling portion, compared to the case where only the cooling air is blown.
  • the cooling system may be configured to cool a predetermined range from the light emitting end face of the bundling portion. If it carries out like this, in addition to the light emission end surface of a bundling part, since the vicinity of the light emission end surface of the said bundling part is cooled, deterioration by the heat
  • the cooling system may include a heat sink having a heat dissipation effect in the predetermined range. If it carries out like this, since the thermal radiation in the said predetermined range is accelerated
  • an antireflection means can be arranged on the emission end face of the optical fiber. If it carries out like this, reflection in the outgoing end face of an optical fiber can be controlled and light utilization efficiency can be raised.
  • an optical member may be disposed to face the light emission end face of the binding portion.
  • the optical member is provided with light diffusing means or antireflection means on at least one of the light emitting surface and the light incident surface.
  • the light diffusing means is provided, the non-uniformity of the intensity distribution can be relaxed compared to before entering the optical member, and the light spreading angle can be adjusted to an appropriate state.
  • the antireflection means is provided, the luminous flux reflected by the optical member can be reduced, so that the light use efficiency can be increased, and the temperature of the bundling portion due to the reincident incidence of the reflected light. The rise can be suppressed.
  • the cooling system may be configured to cool the light incident surface and the light emitting surface of the optical member. If it carries out like this, degradation by the heat
  • the lighting device may further include a rod integrator on which light emitted from the bundling portion is incident.
  • the rod integrator is provided with light diffusing means on the light incident surface. In this way, even if a diffuser or the like is not provided in front of the rod integrator, the non-uniformity of the intensity distribution is reduced when entering the rod integrator, and the light spread angle is controlled to an appropriate angle. can do.
  • the light emitting surface and / or the light incident surface of the translucent member it is desirable to dispose a translucent member between the bundling portion and the rod integrator.
  • antireflection means is provided on the light emitting surface and / or the light incident surface of the translucent member. It is desirable to be arranged. In this way, the light emitted from the bundling portion can be efficiently taken into the rod integrator by the translucent member, and the reflection on the surface of the translucent member is suppressed by the antireflection means, so that the light utilization efficiency is improved. Can be increased.
  • the antireflection means is arranged on the light incident surface of the light transmissive material, the light flux reflected by the light incident surface of the light transmissive member and re-entering the bundling portion can be reduced. The temperature rise of the part can be suppressed.
  • the second aspect of the present invention relates to a projection display apparatus.
  • a projection display apparatus includes a lighting device according to the first aspect, a light modulation unit that modulates light from the lighting device, and a projection that magnifies and projects light modulated by the light modulation unit.
  • a lens According to the projection display apparatus according to the second aspect, the same effects as those of the illumination apparatus according to the first aspect can be obtained.
  • an illuminating device capable of suppressing deterioration of the binding portion due to heat generated by light emission, and a projection display apparatus equipped with the illuminating device.
  • FIG. 1A to FIG. 1C are diagrams illustrating the configuration of the illumination device according to the first embodiment.
  • the figure (a) is a top view of an illuminating device
  • the figure (b) and (c) are the figures which looked at the outgoing end of the bundle from the X direction and the Y direction, respectively.
  • the lighting device includes a plurality of light source units 100, a plurality of optical fibers 200, a bundle 300, a spot fan 400, a diffusion plate 500, and a straight rod 600. .
  • a plurality (for example, nine) of light source units 100 are arranged in a line at a predetermined interval in the Z-axis direction of FIG. 200 is arranged.
  • Each light source unit 100 emits red light (R light), green light (G light), or blue light (B light).
  • the emitted laser light is incident on the incident end of the optical fiber 200, propagates through the fiber, and is emitted from the exit end.
  • the bundle 300 bundles all the optical fibers 200 into one on the emission end side.
  • the bundle 300 has a cylindrical shape and is formed of a material such as metal or resin.
  • the optical fiber 200 is bundled in a form corresponding to the shape of the inner surface of the bundle 300.
  • the optical fiber 200 for R light which has a smaller influence of the refractive index on the optical member than the B light and G light, be arranged outside the optical fiber 200 for B light and G light.
  • the shape of the output end surface of the bundle 300 is a circular shape, it may be a square shape and is not limited to a specific shape.
  • the bundle 300 is filled with an epoxy resin 310, whereby the emission end of the optical fiber 200 is bundled in the bundle 300.
  • the exit end face of the optical fiber 200 is not covered with the epoxy resin 310.
  • the entire exit end face of the bundle 300 is coated with an AR coat 320.
  • the AR coat 320 is directly coated on the exit end face of the optical fiber 200 and further coated on the other end faces of the bundle 300 and the epoxy resin 310 as shown in FIG. Yes.
  • the transmittance at the exit end face of the optical fiber 200 is improved by 3 to 4%.
  • the AR coat 320 suppresses reflection of the emitted laser light at the exit end face of the optical fiber 200, and increases the utilization efficiency of the laser light.
  • the laser light from each light source unit 100 is collected by the optical fiber 200, and the laser light (illumination light) having high brightness is emitted forward (X-axis direction) from the emission end face of the bundle 300.
  • the AR coat 320 is made of a dielectric multilayer film and has a property of easily absorbing heat. For this reason, when the laser light is emitted from the emission end face of the optical fiber 200, the heat absorbed by the AR coat 320 moves into the bundle 300, and the temperature of the light emission end of the bundle 300 increases.
  • the spot fan 400 is disposed in the vicinity of the exit end face of the bundle 300 and the entrance face of the diffuser plate 500.
  • the cooling air sent from the spot fan 400 cools the exit end face of the bundle 300 and the entrance face of the diffusion plate 500.
  • FIG. 2 is a diagram showing a positional relationship between the spot fan 400, the bundle 300, and the diffusion plate 500.
  • FIGS. 9A and 9B are a top view and a side view of the vicinity of the spot fan 400, respectively.
  • FIG. 4C is a side view showing a modified example of the spot fan 400.
  • the spot fan 400 includes an intake port 401, a duct 402, and an exhaust port 403.
  • the duct 402 is tapered toward the exhaust port 403.
  • the exhaust port 403 has a rectangular shape that is long in the Y-axis direction so as to sufficiently cover the emission end portion of the bundle 300 and the diffusion plate 500. Note that the gap between the surface of the AR coat 320 and the incident surface of the diffusion plate 500 is about several millimeters.
  • the exhaust port 403 has a width in the X-axis direction so that cooling air can pass through the gap.
  • the air taken in from the intake port 401 is collected by the tapered duct 402 and is ejected from the exhaust port 403 toward the gap between the surface of the AR coat 320 and the incident surface of the diffusion plate 500 with a relatively strong force. Thereby, the cooling air passes through the gap, and the surface of the AR coat 320 and the incident surface of the diffusion plate 500 are cooled.
  • the exhaust port 403 is wide in the X-axis direction so that the cooling air blown from the exhaust port 403 passes through the upper and lower sides of the exit end of the bundle 300, the upper and lower sides of the diffusion plate 500, and the exit surface side.
  • the air path at the tip of the tapered duct may be branched so that the emission end of the bundle 300 and the entire diffusion plate 500 can be cooled.
  • an ion generator 404 is disposed in the vicinity of the intake port 401 in the spot fan 400, and ions are mixed into the air taken in from the intake port 401 by the fan 405, and then from the duct 402.
  • the cooling air can also be ejected.
  • the ion generator is configured to generate, for example, ions having an antistatic effect by high voltage discharge in which a high voltage is applied between the electrodes.
  • the diffuser plate 500 is made of a light transmission material having a parallel plate shape, and is disposed on the exit surface side of the bundle 300.
  • the incident surface of the diffusing plate 500 is a flat plane and is perpendicular to the X-axis direction.
  • the exit surface of the diffusing plate 500 has a diffusing surface 500a.
  • the diffusion surface 500a has a fine uneven structure.
  • Such a concavo-convex structure is formed by, for example, a hologram pattern formed by etching, or is formed by immersing and corroding the surface of the diffusion plate in a strong acid such as hydrofluoric acid.
  • the laser beam emitted from the bundle 300 is incident on the incident surface of the diffusion plate 500 and is emitted from the diffusion surface 500a of the emission surface. The operation of the diffusing surface 500a will be described later with reference to FIG.
  • the straight rod 600 is disposed on the exit surface side of the diffusion plate 500.
  • the laser light emitted from the diffusion plate 500 is incident on the incident end face of the straight rod 600, and after the intensity distribution of the laser light is uniformed or the angular distribution of the laser light is controlled, the laser light is emitted from the outgoing end face of the straight rod 600. Emitted.
  • FIG. 3A is a diagram for explaining that the intensity distribution of the laser light is made uniform by the diffusion plate 500.
  • FIG. 2A also shows the internal configuration of the light source unit 100 and the optical fiber 200.
  • the light source unit 100 includes a plurality of (for example, five) light emitting sources 101 to 105.
  • Laser light emitted from the light emitting sources 101 to 105 is collected by the condenser lens 110 and enters the incident end of the optical fiber 200.
  • the optical fiber 200 includes a core 200a at the center and a clad 200b around the core 200a.
  • the laser light incident from the incident end propagates to the exit end while being repeatedly reflected in the core 200a.
  • a multimode fiber is used as the optical fiber 200.
  • the multimode fiber has a large core diameter and can easily capture laser light from the incident end face.
  • the multimode fiber has a property of emitting laser light incident in a state where the angular distribution is different while the angular distribution is different. Therefore, the laser beams emitted from the plurality of light emitting sources 101 to 105 and incident on the optical fiber 200 with different angular distributions are emitted from the optical fiber 200 with different angular distributions as shown in FIG.
  • the multimode fiber has a large core diameter and can easily capture laser light from the incident end face.
  • the multimode fiber has a property of emitting laser light incident in a state where the angular distribution is different while the angular distribution is different. Therefore, the laser beams emitted from the plurality of light emitting sources 101 to 105 and incident on the optical fiber 200 with different angular distributions are emitted from the optical fiber 200 with different angular distributions as shown in FIG.
  • the laser light emitted from the optical fiber 200 may be bright and dark in the YZ plane of FIG. In that case, the light intensity changes according to the position from the central axis of the laser beam.
  • a broken line in FIG. 3B schematically shows the intensity distribution in the Z-axis direction of the laser light immediately before entering the diffusion plate 500.
  • the light intensity at the central axis of the light beam is the smallest, and there is a peak of the light intensity at a position away from the central axis of the light beam by ⁇ Z in the Z-axis direction. That is, the light intensity has a peak at a position away from the light flux central axis by ⁇ Z in the Z-axis direction.
  • Such intensity distribution occurs in the same tendency in the optical path from the exit end face of the optical fiber 200 to the diffusion plate 500.
  • the diffusion plate 500 makes the intensity distribution of the laser light emitted from the optical fiber 200 uniform by the diffusion action of the diffusion surface 500a. That is, since the laser light incident on the diffusing plate 500 is diffused by the diffusing surface 500a, the laser light emitted from the diffusing plate 500 is prevented from being biased in light intensity due to the position from the central axis of the light beam.
  • the solid line in FIG. 3B schematically shows the intensity distribution of the laser light immediately after being emitted from the diffusion plate 500. As shown in the figure, due to the diffusing action of the diffusing plate 500, the deviation of the light intensity due to the position from the central axis of the light beam is alleviated compared to before the incident on the diffusing plate 500.
  • the laser light when the laser light is diffused by the diffusion plate 500, light having a larger angle component is generated than before the diffusion.
  • the intensity of light traveling in a direction inclined by an angle ⁇ with respect to the X-axis direction is schematically shown in FIG. Intensity distribution.
  • the dotted line is the intensity distribution before passing through the diffusion plate 500
  • the solid line is the intensity distribution after passing through the diffusion plate 500.
  • the spread angle of the laser beam becomes larger than before diffusion.
  • how large the divergence angle depends on the amount of increase in the angle component by the diffusion plate 500, that is, depends on the diffusion action (diffusion angle) on the diffusion surface 500a. Therefore, by adjusting the diffusion action (diffusion angle) of the diffusion surface 500a, the spread angle of the laser light after passing through the diffusion plate 500 can be set to an appropriate angle.
  • the diffusion angle of the diffusion surface 500a can be controlled by setting. That is, when the diffusion surface 500a is formed by a hologram pattern, the diffusion angle is set by interference fringes by the hologram, and when the diffusion surface 500a is formed by being immersed in hydrofluoric acid, the diffusion angle is immersed in hydrofluoric acid. Is set by the time.
  • the bias of the intensity distribution of the laser light emitted from the optical fiber 200 is large, but when the optical fiber 200 is a single mode fiber, the bias is Get smaller. However, regardless of which fiber is used, it is desirable to use the diffusion plate 500 in order to make the intensity distribution of the laser light uniform.
  • the exit end of the optical fiber 200, the AR coat 320, and the incident surface of the diffusion plate 500 are cooled by the cooling air sent from the spot fan 400. For this reason, the temperature rise in these parts is suppressed.
  • the generated heat is not easily emitted from the AR coat 320, the bundle 300, and the diffusion plate 500.
  • the heat is absorbed by the AR coat 320 and moved into the bundle 300, the light emitting end of the bundle 300 is easily heated. This phenomenon becomes remarkable when the power of the light source unit 100 is increased or when the number of bundles is increased. In this case, the epoxy resin 310 may vaporize due to a temperature rise.
  • the surface of the AR coat 320 and the incident surface of the diffusion plate 500 are cooled by the cooling air sent from the spot fan 400. Therefore, it is possible to efficiently cool the portion where the temperature rises due to heat, and as a result, it is possible to suppress the vaporization of the epoxy resin 310 due to the temperature rise.
  • the reflection of the laser beam at the emission end of the optical fiber 200 is suppressed by the AR coat 320, more laser beam is guided to the incident surface of the diffusion plate 500. Further, the intensity distribution of the laser light is made uniform and the spread angle is adjusted by the diffusion surface 500a, and the intensity distribution is made uniform by the straight rod 600.
  • FIG. 4A is a diagram illustrating a configuration of the first modification. This modified example is different from the configuration of FIG. 1A in that the exit end face of the bundle 300 is not coated with the AR coat 320.
  • the utilization efficiency of the laser beam is reduced.
  • the exit end face of the bundle 300 is not coated with the AR coat 320, heat absorption by the AR coat 320 does not occur, and the temperature rise at the exit end of the bundle 300 can be suppressed compared to the configuration example of FIG. it can.
  • FIG. 4B is a diagram illustrating a configuration of a second modification of the first embodiment.
  • This modified example is different from the configuration (modified example 1) in FIG. 5A in that the incident surface of the diffuser plate 500 is coated with an AR coat 510.
  • the AR coat 510 suppresses the laser light emitted from the bundle 300 from being reflected by the incident surface of the diffusion plate 500, and the use efficiency of the laser light is enhanced. Further, since the return light due to the reflection is prevented from entering the exit end face of the bundle 300 again, the temperature rise of the exit end face of the bundle 300 is further suppressed.
  • FIG. 5A is a diagram illustrating a configuration of a third modification of the first embodiment. This modification is different from the configuration of FIG. 1A in that a diffusion surface 500b is formed on the incident surface of the diffusion plate 500.
  • the distance from the diffusing surface to the incident surface of the straight rod 600 is longer than that in FIG. 1A, the laser beam lost due to the diffusing action of the diffusing surface increases and enters the straight rod 600.
  • the luminous flux of the laser light is reduced.
  • the surface of the AR coat 320 and the diffusion surface 500b that easily absorbs heat can be simultaneously cooled by the cooling air sent from the spot fan 400, the thermal deterioration of the emission end portion of the bundle 300 and the diffusion surface 500b. Can be suppressed.
  • FIG.5 (b) is a figure which shows the structure of the modification 4 of 1st Embodiment.
  • This modified example is different from the configuration of FIG. 1A in that the incident surface of the diffusion plate 500 is coated with the AR coat 510 and the spot fan 410 is arranged instead of the spot fan 400. .
  • the spot fan 410 has a wide exhaust port 411 in the X-axis direction, and the cooling air sent from the exhaust port 411 is between the emission end surface of the bundle 300 (the surface of the AR coat 320) and the incident surface of the straight rod 600. It is ejected toward the range. In this case, the surface of the AR coat 320, the entire diffusion plate 500, and the incident surface of the straight rod 600 are cooled by the cooling air sent from the exhaust port 411. Thereby, the thermal degradation of the exit end of the bundle 300, the diffusion plate 500, and the incident surface of the straight rod 600 can be suppressed.
  • a spot fan 420 shown in FIG. 5C may be used instead of the spot fan 410.
  • the duct 421 of the spot fan 420 is bifurcated, and two exhaust ports 421a and 421b are formed.
  • the cooling air generated by the spot fan 420 is divided into two by the duct 421 and sent out from the exhaust ports 421a and 421b, respectively.
  • the cooling air sent from the exhaust ports 421a and 421b is directed to the cap between the bundle 300 and the diffusion plate 500 and the gap between the diffusion plate 500 and the straight rod 600, respectively. In this way, the surface of the AR coat 320, the surface of the AR coat 510, the diffusion surface 500a, and the incident surface of the straight rod 600 can be directly cooled.
  • the cooling air may be sent only to the gap between the diffusion plate 500 and the straight rod 600 as shown in FIG.
  • the duct 421 may be configured so that the amount of cooling air ejected from the exhaust port 421b is larger than that of the exhaust port 421a.
  • FIG. 6A is a diagram illustrating a configuration of a fifth modification of the first embodiment. This modified example is different from the configuration example of FIG. 1A in that a heat sink 330 is installed at the exit end of the bundle 300 and a diffusion surface 500b is formed on the incident surface of the diffusion plate 500. Yes.
  • FIG. 4B is a perspective view of the emission end portion of the bundle 300 in this case.
  • two heat sinks 330 are installed outside the emission end of the bundle 300 so as to sandwich the optical fiber 200.
  • a plurality of heat radiation pins 331 are arranged on the heat sink 330 at intervals. If it carries out like this, since the heat sink 330 accelerates
  • three or more heat sinks 330 may be installed outside the emission end of the bundle 300. Further, the heat sink 330 may be arranged over the entire circumference of the emission end of the bundle 300.
  • a heat sink provided with a plate-like heat radiation plate instead of the heat radiation pin 331 may be used.
  • a heat sink 332 in which donut-shaped heat radiation plates 333 are arranged at a predetermined interval may be used. In this case as well, heat radiation at the exit end of the bundle 300 is promoted, as in FIGS.
  • the heat sink 330 may be cooled by a spot fan different from the spot fan 400.
  • the heat sink 330 may be cooled simultaneously with other cooling ranges by the spot fans 410 and 420 shown in FIGS.
  • Fig.7 (a) is a figure which shows the structure of the illuminating device of 2nd Embodiment.
  • the diffusion plate 500 is removed, and the diffusion surface 600 a is disposed on the incident surface of the straight rod 600.
  • the interval between the exit end face of the bundle 300 and the entrance face of the straight rod is the same as in the first embodiment.
  • the laser light incident on the straight rod 600 may be reflected by the diffusion surface 600a and may be incident on the exit end surface of the bundle 300. That is, the temperature of the exit end face of the bundle 300 may increase due to the return light.
  • the configuration of the lighting device can be simplified.
  • FIG. 7B is a diagram illustrating a first modification of the second embodiment.
  • the glass plate 700 is disposed between the exit end face of the bundle 300 and the straight rod 600.
  • the glass plate 700 is a light transmission material having a parallel plate shape, and is disposed on the exit surface side of the bundle 300.
  • the entrance surface and the exit surface of the glass plate 700 are flat and flat, and are perpendicular to the X-axis direction.
  • the incident surface of the glass plate 700 is coated with an AR coat 710.
  • the AR coating 710 suppresses reflection at the incident surface of the glass plate 700, thereby suppressing the temperature rise at the exit end surface of the bundle 300 due to the return light. Further, by bringing the incident surface of the glass plate 700 closer to the exit surface of the bundle 300, the amount of laser light taken in by the glass plate 700 can be increased, and as a result, the light from the bundle 300 can be efficiently guided to the straight rod 600. it can. For this reason, the laser beam capturing efficiency of the straight rod 600 is improved, and the utilization efficiency of the laser beam is increased.
  • the utilization efficiency of the laser beam is enhanced, and at the same time, the emission end of the bundle 300 is improved. Deterioration due to heat can be suppressed.
  • FIG. 7C is a diagram illustrating a second modification of the second embodiment.
  • the AR coating 720 is coated on the exit surface rather than the entrance surface of the glass plate 700.
  • the temperature rise on the exit end face of the bundle 300 is suppressed.
  • a part of the laser light is reflected by the incident surface of the glass plate 700 and is incident on the output surface of the bundle 300, so that the output of the bundle 300 is compared with the modified example 1 in FIG. The temperature at the end tends to rise.
  • FIG. 7D is a diagram showing a third modification of the second embodiment.
  • the AR coating 720 is further coated on the exit surface of the glass plate 700 as compared with the configuration of FIG. For this reason, the utilization efficiency of a laser beam is further improved compared with the modification 2 of the said 2nd Embodiment.
  • FIG. 8A shows the straight rod 600 used in FIGS. 1 and 4 to 6 described above.
  • the straight rod 600 makes the intensity distribution of the laser light uniform.
  • the laser light incident at an angle ⁇ is emitted at the same angle ⁇ even when emitted from the straight rod 600.
  • the laser light incident on the straight rod 600 includes red light (R), green light (G), and blue light (B).
  • R red light
  • G green light
  • B blue light
  • the emission angles of G light and B light are substantially equal, but the emission angle of R light is smaller than the emission angles of G light and B light.
  • the emission angle of each color light does not change by the straight rod 600. For this reason, in the projection lens arranged at the rear stage of the illumination device, R light with a small emission angle is captured without loss, whereas G light and B light with a large emission angle are attenuated without capturing peripheral luminous flux. Problem arises.
  • FIG. 8 (b) is a diagram showing a main configuration part of the third embodiment for solving the problem due to the difference in the emission angle.
  • the taper rod 610 is connected to the incident end face of the straight rod 611 and integrated with the straight rod 611. Further, such an integral structure is arranged in place of the straight rod 600 in FIGS. 1 and 4 to 6 described above.
  • the emission angle of R light is ⁇ 1
  • the emission angles of G light and B light are ⁇ 2.
  • the length and inclination of the taper rod 610 are set so that when the R light, G light, and B light incident from the incident end face of the taper rod 610 are emitted from the straight rod 611, the uniform emission angle ⁇ 1 is obtained. Is done. That is, by the integrated structure of the straight rod 611 and the taper rod 610, the emission angles of the G light and the B light are matched to the emission angle of the R light.
  • the integral structure of the taper rod 610 and the straight rod 611 shown in FIG. 8B is used, the emission angles of the R light, the G light, and the B light become substantially the same, and each color light is efficiently transmitted in the projection lens. Can be captured. Therefore, a good image can be projected on the projection surface.
  • FIG. 8C is a diagram illustrating a first modification of the third embodiment. This modified example is different from the configuration of FIG. 8B in that a diffusing surface 610a is disposed on the incident surface of the tapered rod 610. The taper rod 610 and the straight rod 611 according to this modification are replaced with the straight rod 600 shown in FIGS.
  • FIG. 8D is a diagram illustrating a second modification of the third embodiment.
  • this modified example only the taper rod 620 is used as compared with FIG. Also in this case, the length and the inclination of the taper rod 620 are set so that the emission angles ⁇ 3 are uniform in the state of emission from the taper rod 620.
  • the taper rod 620 makes the intensity distribution of the laser light uniform and also makes the emission angle of the laser light uniform. Therefore, the same effect as described with reference to FIG.
  • FIG. 9 is a diagram illustrating a specific configuration example of the bundle 300 used in the embodiment.
  • FIG. (A) of the figure shows the configuration of a holder 340 that bundles a plurality of optical fibers 200.
  • the holder 340 has a cylindrical shape.
  • the holder 340 is formed with a fiber accommodating portion 343 having a rectangular cross section and penetrating in the front-rear direction.
  • an opening 341 connected to the fiber accommodating portion 343 is formed on the front upper surface of the holder 340.
  • the plurality of optical fibers 200 are accommodated in the fiber accommodating portion 343 such that the emission end faces are aligned with the front surface of the holder 340.
  • the holder 340 is made of a metal such as brass.
  • FIG. 4B is a view showing the emission end portion of the optical fiber 200.
  • the outer sides of the core 200a and the clad 200b of the optical fiber 200 are covered with a coating 200c between the light source unit 100 and the holder 340 as shown in the figure.
  • the portion of the optical fiber 200 bundled by the holder 340 is made up of only the core 200a and the clad 200b with the coating 200c removed.
  • the core 200a is made of resin
  • the clad 200b is made of glass.
  • the optical fiber 200 is spread over the fiber housing portion 343 with the coating 200c removed.
  • an organic adhesive such as an epoxy resin is poured from the opening 341, and the emission end of the optical fiber 200 is fixed by the adhesive.
  • a holding lid 342 having the same dimensions as the opening 341 is fitted into the opening 341.
  • the holding lid 342 is made of a metal such as brass, like the holder 340.
  • FIG. 10A shows a holder cover 301 that covers the holder 340.
  • the holder cover 301 has a cylindrical shape like the holder 340.
  • the holder cover 301 is formed with a holder accommodating portion 301 b having an inner surface that is substantially the same shape as the outer surface of the holder 340.
  • a screw hole 301a penetrating the holder accommodating portion 301b is provided in the vicinity of the front side of the holder cover 301.
  • the holder 340 shown in FIG. 10A is inserted into the holder accommodating portion 301b, and a screw is passed through the screw hole 301a as shown in FIG.
  • the core 200a is made of resin, but an optical fiber 200 in which the core 200a is made of quartz can also be used.
  • the clad 200b is made of quartz to which fluorine is added.
  • the emission end of the optical fiber 200 is fixed by an adhesive made of an inorganic material. In this way, although the core diameter is reduced, an increase in the temperature of the adhesive can be suppressed as compared with the case where an organic adhesive such as an epoxy resin is used. Further, since the core 200a is made of quartz, the heat resistance of the core 200a is improved.
  • the bundle 300 is constituted by the holder 340 and the holder cover 301 as described above.
  • the exit end of the optical fiber 200 may not be fixed by an adhesive.
  • the clad 200b may be a resin.
  • the emission end portion of the optical fiber 200 is fixed in the fiber accommodating portion 343 by the pressing force from the holding lid 342 by tightening the screw. For this reason, although the fixing property of the optical fiber 200 is inferior to the case where an adhesive is used, the influence of heat on the adhesive can be avoided.
  • the opening 341 formed in the holder 340 may be formed on the front side and the rear side of the holder 340 as shown in FIG. 10A, and from the front side as shown in FIG. 10B. You may form so that it may connect over back.
  • a holder cover 302 shown in FIG. Screw holes 302a and 302b are formed on the front side and the rear side of the holder cover 302, respectively, as shown in the figure.
  • the screws press the holding lid 342 through the screw holes 302a and 302b. If it carries out like this, since the optical fiber 200 is fixed also in the back side of the holder 340, the fixability of the optical fiber 200 with respect to the bundle 300 can be improved. It should be noted that the fixing with the adhesive may be performed either at the front or the rear of the holder 340 or at one of them, or may not be performed with the adhesive at the front or the rear.
  • FIG. 10D is a diagram illustrating another configuration example of the bundle 300.
  • a hole 351 through which the optical fiber 200 is passed is formed in the holder 350, and the optical fiber 200 is passed through the hole 351.
  • the optical fiber 200 passed through the hole 351 of the holder 350 is fixed by an adhesive only on the rear side of the holder 350.
  • the adhesive for fixing the optical fiber 200 is not used at the exit end of the bundle 300, the influence of heat on the adhesive can be avoided.
  • the holder cover 303 can be omitted.
  • FIG. 11 is a diagram illustrating a specific arrangement example of the spot fans 400 used in the first embodiment.
  • (A) of the same figure is a figure which shows the state by which the spot fan 400 is arrange
  • the spot fan 400 is fixed to a fixed plate 810 installed on the base of the lighting device.
  • the plurality of optical fibers 200 are bundled and bundled together with the bundle 300 by the fixing mechanisms 801 and 802 and sandwiched from the positive direction and the negative direction of the Z axis.
  • the fixing mechanisms 801 and 802 are installed on the substrate of the lighting device so as to be movable in the X-axis direction.
  • a rod 803 having a predetermined length protrudes from the fixing mechanism 802 on the emission end face side of the bundle 300.
  • a holder 830 is installed between the exit end face of the bundle 300 and the entrance face of the straight rod 600.
  • the fixing mechanisms 801 and 802 and the holder 830 are prevented from approaching the holder 830 more than a predetermined interval when the rod 803 hits the holder 830. Thereby, the position adjustment of the fixing mechanisms 801 and 802 in the X-axis direction can be performed within a range where the emission end face of the bundle 300 does not contact the holder 830.
  • FIG. (B) of the figure shows the structure of the holder 830.
  • a diffusion plate 500 and a receiving portion 820 into which the diffusion plate 500 is fitted are disposed.
  • the receiving portion 820 is formed with an opening 821, two flanges 822, and two screw receivers 820a.
  • the two screw receivers 820a are formed at positions symmetrical with respect to the receiving portion 820 in the Y-axis direction.
  • the diffusion plate 500 is fitted into the opening 821 and is held by the receiving portion 820 so as not to move in the X-axis positive direction, the Y-axis direction, and the Z-axis positive direction.
  • the holder 830 is formed with an opening 831, a flange portion 832, and two screw holes 830 a as illustrated.
  • the two screw holes 830a are formed at positions symmetrical with respect to the holder 830 in the Y-axis direction.
  • the receiving portion 820 holding the diffusion plate 500 is fitted into the holder 830 from the X-axis direction, and in this state, the screw is fastened to the screw receiver 820a through the screw hole 830a.
  • the diffusing plate 500 is fixed so as not to move in the negative X-axis direction and the negative Z-axis direction. In this state, the diffusing plate 500 faces the emission end face of the bundle 300 through the opening 831.
  • the glass plate 700 is held by the holder 830 instead of the diffusion plate 500.
  • the exit end face of the bundle 300 and the entrance face of the diffusion plate 500 can be cooled by the cooling air sent from the exhaust port 403 of the spot fan 400.
  • the spot fan 400 is installed in each bundle 300 with the same configuration as shown in FIG. The
  • FIG. 12 is a diagram showing a configuration of an optical system of a projector on which the illumination device of the present embodiment is mounted.
  • the illuminating device 10 is the illuminating device shown as said 1st thru
  • the illumination light emitted from the illumination device 10 enters a TIR (Total Internal Reflection) prism (internal total reflection prism) 15 via relay lenses 11 and 12, a mirror 13, and a relay lens 14. Details of the configuration of the TIR prism 15 are described in, for example, Japanese Patent Application Laid-Open No. 2006-79080.
  • the light incident on the TIR prism 15 is separated into R light, G light, and B light by the red prism, green prism, and blue prism constituting the TIR prism 15, and is a reflection type composed of DMD (Digital-Micro-mirror-Device).
  • the light is incident on the light modulation elements 16, 17 and 18.
  • the light paths of the R light, G light, and B light modulated by the light modulation elements 16, 17, and 18 are integrated by the red prism, the green prism, and the blue prism.
  • the light enters the projection lens 19.
  • FIG. 12 shows an optical system using the TIR prism 15
  • the illumination device according to the above-described embodiment makes the color light separated by the plurality of dichroic mirrors incident on three to three liquid crystal panels
  • it can also be used as appropriate for illumination devices in other optical systems such as an optical system (three-plate type optical system) that combines color light modulated by a liquid crystal panel with a dichroic prism.
  • the optical fibers 200 are bundled by the bundle 300 so that the R light, the G light, and the B light are mixed.
  • the fibers may be bundled by the bundle for each color.
  • the color light from each bundle is made uniform by the rod integrator, and each uniformed color light is synthesized into white light by the dichroic mirror, and the synthesized white light is applied to the optical system of FIG. good.
  • each color light made uniform by the rod integrator may be guided to each liquid crystal panel of a three-plate optical system.
  • the lighting device of the present invention can also be mounted on other devices such as an exposure device and a processing lighting machine.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

L’invention concerne un dispositif d’illumination qui permet de supprimer la détérioration d’un faisceau due à la chaleur générée par la lumière émise, ainsi qu’un dispositif d’affichage d'image par projection sur lequel est monté le dispositif d’illumination. Le dispositif d’illumination comprend une pluralité de sources de lumière (100) qui émettent des faisceaux laser, une pluralité de fibres optiques (200) dans lesquelles sont entrés les faisceaux laser émis par les sources de lumière (100), un faisceau (300) qui regroupe les parties d’extrémité d’émission des fibres optiques, et un ventilateur ponctuel (400) qui refroidit le faisceau (300). Le ventilateur ponctuel (400) fait circuler de l’air de refroidissement sur une surface d’extrémité d’émission de lumière du faisceau (300).
PCT/JP2009/067019 2008-11-26 2009-09-30 Dispositif d’illumination et dispositif d’affichage d’image par projection Ceased WO2010061684A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP09828933A EP2369410A4 (fr) 2008-11-26 2009-09-30 Dispositif d illumination et dispositif d affichage d image par projection
CN2009801467456A CN102224456A (zh) 2008-11-26 2009-09-30 照明装置及投射型影像显示装置
US13/111,210 US20110216286A1 (en) 2008-11-26 2011-05-19 Illumination device and projection display device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008300417 2008-11-26
JP2008-300417 2008-11-26

Related Child Applications (1)

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US13/111,210 Continuation-In-Part US20110216286A1 (en) 2008-11-26 2011-05-19 Illumination device and projection display device

Publications (1)

Publication Number Publication Date
WO2010061684A1 true WO2010061684A1 (fr) 2010-06-03

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US (1) US20110216286A1 (fr)
EP (1) EP2369410A4 (fr)
JP (1) JP2010152323A (fr)
CN (1) CN102224456A (fr)
WO (1) WO2010061684A1 (fr)

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JP2013149449A (ja) * 2012-01-18 2013-08-01 Sharp Corp 発光装置、照明装置および車両用前照灯
US9470895B2 (en) 2013-06-18 2016-10-18 Sharp Kabushiki Kaisha Light-emitting device
WO2024047945A1 (fr) * 2022-08-31 2024-03-07 浜松ホトニクス株式会社 Appareil d'irradiation de lumière, appareil de mesure, appareil d'observation et appareil de mesure d'épaisseur de film

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WO2012156519A1 (fr) * 2011-05-17 2012-11-22 Lumatec Gesellschaft für medizinisch-technische Geräte mbH Appareil d'éclairage ainsi que dispositif d'éclairage, projecteur optique et phare comprenant respectivement au moins un appareil d'éclairage de ce type
CN103292209B (zh) * 2012-03-02 2015-06-17 赛恩倍吉科技顾问（深圳）有限公司 背光模组
JP2014085432A (ja) * 2012-10-22 2014-05-12 Mitsubishi Electric Corp レーザ光出射装置
JP5611490B1 (ja) 2012-12-26 2014-10-22 シチズンホールディングス株式会社 投影装置
US9410669B2 (en) * 2013-04-10 2016-08-09 The Boeing Company Multi-lamp solar simulator
JP5693803B1 (ja) 2013-07-26 2015-04-01 シチズンホールディングス株式会社 光源装置および投影装置
CN104765242B (zh) * 2015-05-05 2017-04-12 湖北久之洋红外系统股份有限公司 多孔径拼接大孔径合成的高亮度三基色激光光源光学系统
FR3037125B1 (fr) * 2015-06-08 2019-10-11 Valeo Vision Dissipateur thermique pour module d'emission lumineuse, module d'emission lumineuse et dispositif lumineux associes
CN106444245A (zh) * 2016-08-26 2017-02-22 湖北久之洋红外系统股份有限公司 一种无散斑三基色激光光源
FR3065344B1 (fr) 2017-04-14 2020-11-06 Xyzed Projecteur de grande puissance a source lumiere laser deportee
CN109519718A (zh) * 2017-09-18 2019-03-26 北京德瑞工贸有限公司 一种非激发荧光体的高显色激光照明系统
CN107994447A (zh) * 2018-01-10 2018-05-04 西北核技术研究所 光纤端面耦合防护装置

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JP2013149449A (ja) * 2012-01-18 2013-08-01 Sharp Corp 発光装置、照明装置および車両用前照灯
US10066809B2 (en) 2012-01-18 2018-09-04 Sharp Kabushiki Kaisha Light emitting device with optical member for exciting fluorescence, illumination device, and vehicle headlamp having the same
US10514151B2 (en) 2012-01-18 2019-12-24 Sharp Kabushiki Kaisha Light-emitting device, illumination device, and vehicle headlamp
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WO2024047945A1 (fr) * 2022-08-31 2024-03-07 浜松ホトニクス株式会社 Appareil d'irradiation de lumière, appareil de mesure, appareil d'observation et appareil de mesure d'épaisseur de film

Also Published As

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CN102224456A (zh) 2011-10-19
EP2369410A4 (fr) 2012-05-30
JP2010152323A (ja) 2010-07-08
US20110216286A1 (en) 2011-09-08
EP2369410A1 (fr) 2011-09-28

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